FCA 9-Speed Transmission Software Glitch: Symptoms, Fixes & Warranty Coverage
Many drivers of 2015-2016 Jeep, Chrysler, and Fiat vehicles equipped with the 948TE nine-speed automatic transmission have reported erratic shifting behavior. This widespread issue stems from a software malfunction in the transmission control module, leading to rough gear changes and diminished driving quality. MotorVero's comprehensive guide explains the problem, affected models, and how to get it resolved under warranty.
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Key Takeaways
- Affected Models: 2015-2016 Jeep Renegade, Chrysler 200, Fiat 500X, Jeep Cherokee, and Ram ProMaster City
- Core Issue: Software glitch in the transmission control module causing rough shifting
- Official Fix: Dealership software update (TSB 21-013-16)
- Cost: Covered under FCA's limited new vehicle warranty
- Next Steps: Contact your dealer with VIN to confirm eligibility
Understanding the 948TE Transmission Software Problem
The 948TE nine-speed automatic transmission, used across several Fiat Chrysler Automobiles (FCA) models, has been plagued by software-related shifting issues since its introduction. The transmission control module (TCM), which governs shift timing and pressure, contains programming flaws that manifest as:
- Harsh or delayed upshifts between 3rd and 4th gears
- Unnecessary downshifts during steady cruising
- Clunky engagement when shifting from Park to Drive
- Erratic shift patterns in stop-and-go traffic
These symptoms typically worsen in cold weather and are most noticeable at low to moderate speeds. While frustrating, the issues don't represent mechanical failure but rather improper software calibration.
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Complete List of Affected Vehicles
FCA's Technical Service Bulletin 21-013-16 specifically addresses the following models equipped with the problematic 948TE transmission:
- Jeep: 2015-2016 Renegade, 2015 Cherokee
- Chrysler: 2015-200 200
- Fiat: 2016 500X
- Ram: 2015 ProMaster City
Note that some 2017 model year vehicles may also exhibit similar symptoms, though they aren't officially listed in this particular bulletin.
Official Repair Procedure
FCA mandates the following corrective actions for affected vehicles:
- Diagnosis: Technicians will road test the vehicle and connect it to the WiTECH diagnostic system to confirm the software mismatch.
- Software Update: Using a secure dealership connection, technicians flash the TCM with updated calibration files.
- Verification: After updating, the vehicle undergoes another road test to confirm proper shift behavior.
The entire process typically takes 30-60 minutes and doesn't require any physical part replacement when only the software issue is present.
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Warranty Coverage Details
This repair is covered under FCA's 3-year/36,000-mile basic limited warranty. Some vehicles may qualify for coverage under the 5-year/60,000-mile powertrain warranty if the basic warranty has expired. There are no deductibles for warranty repairs.
What Owners Should Do
If you experience rough shifting in an affected vehicle:
- Locate your VIN: Find it on your dashboard (visible through the windshield) or registration documents.
- Contact your dealer: Call with your VIN to confirm your vehicle needs this update.
- Schedule service: Request an appointment specifically for TSB 21-013-16.
Find an FCA Certified Repair Center
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Frequently Asked Questions
Will this update affect my transmission's performance?
The recalibration improves shift quality without reducing performance. Some drivers report slightly different shift points that may take brief getting used to.
What if my warranty has expired?
FCA has been known to cover this repair as a goodwill gesture for slightly out-of-warranty vehicles. Always ask your dealer about potential coverage exceptions.
Can independent shops perform this update?
Only dealerships have access to FCA's secure software portal required for this specific update.
Related Service Bulletins to Check
Owners of affected vehicles should also inquire about:
- TSB 21-002-16: Transmission fluid level inspection procedure
- TSB 21-030-17: Clutch C pressure adjustment
- TSB 21-033-18: Torque converter shudder diagnosis
How to Check for Other Recalls
Use MotorVero's free recall checker to identify any outstanding safety recalls for your vehicle by entering your VIN.
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Manufacturer Contact Information
- Chrysler: 800-247-9753
- Fiat: 888-242-6342
- Jeep: 877-426-5337
- Ram: 866-726-4636
- NHTSA Hotline: 888-327-4236
Final Recommendations
Don't ignore persistent transmission issues, as they can lead to premature wear. While this software update resolves most complaints, vehicles with mechanical symptoms (leaks, burning smell, grinding noises) may need additional inspection. Always request documentation of any performed updates for your service records.
Pro Tip: Ask your dealer to check for all available TCM updates, as FCA has released multiple revisions since this bulletin.
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